The substantive policy issues (such as they are) in October are the form of the new government (will the Liberals make long-term agreements with one or more opposition parties or build a majority for each bill separately?), the composition of the new Liberal cabinet, and
a group of bills regulating speech on the internet which were abandoned in-progress when the election was called and will have to start again with the first reading. Four women out of the 35 Liberal cabinet ministers lost their seats. Journalists say that cabinet ministers in this government have mostly been figureheads with ill-defined, overlapping responsibilities and that staffers appointed by the Prime Minister's Office are the ones who actually decide and implement policy. OTOH, Jody Wilson-Raybould and Jane Philpott were Liberal cabinet ministers under Trudeau.
Justin Trudeau celebrated his holding on to office with a small scandal. Having created a National Day of Truth and Reconcilation because it was a Truth and Reconciliation Committee recommendation which didn't take anything away from people with power, he spent the first such day on vacation on the west coast of Vancouver Island. Many people just took that day as a holiday, but it would have been wise for a PM to do something with indigenous people or residential-school survivors or just stay home.
Derek Sloan, the Ontario MP who was ejected from the Conservative caucus after repeatedly aligning himself with white supremacists, came fifth (less than 3% of the vote, behind the PPC) in his new riding in Alberta.
And after the recount, the two leading candidates in one riding were only 12 votes apart.